What is the solution for a young Algerian man who is diligent in prayer but has no luck?

The servant's commitment to their religion and obedience to their Lord is a cause for success in this world and the hereafter, as mentioned in the noble verses.

However, some people disregard other texts, such as: "And We will surely test you with something of fear and hunger and a loss of wealth and lives and fruits, but give good tidings to the patient," expecting their situation to change quickly simply by becoming upright, which did not even happen for the Messenger of Allah, peace and blessings be upon him.

All of Allah Almighty's actions are based on wisdom, whether through giving or restricting, and there is good for the believer in whatever Allah does with them.